How to Repair a Rotten Pillar?

[proffsrik]

Timber garage with a brick veneer. It seems like there is no air gap. Now I'm going to replace the garage doors and realize that I have nothing to screw into since a 100x100 post has completely rotted.

The plastered brick on the outside looks fine, and I would prefer to repair from the inside even if it doesn't last 100 years.

What is the best way to construct my repair?

 

[fribygg]

Why not replace the pelaren?

 

[proffsrik]

Yes, it should of course be replaced.
I'm more wondering what I should do outside of this (since I'm fixing from the inside).
Of course, I can put in new asphalt board from the inside and then a new post. But then there will be a gap against the existing asphalt board and also no air gap in this exposed corner.
Of course, I want to tear down as little as needed.

 

[fribygg]

Why not fold in a wind barrier before the new pillar?

 

[proffsrik]

And no new asphalt board do you mean?
That might be smart. Then there should automatically be a bit of air gap as well.

There is also diffusion-open wind protection plastic. Could that be better than paper?

 

[fribygg]

I would choose regular Örnpapp, it's simple, good, and cheap.